I assume this bug (or https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1268146 which sounds the same to me) is why I cannot use 14.04 on my (ancient) Dell Dimension 3000.
It used to run 12.04 fine but with 14.04 it is unusably slow. Compiz runs at least 25% of the CPU when nothing is being done (other than System Monitor showing this). -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1293384 Title: Compiz CPU usage dramatically increased in Ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1293384/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp